人形Avatar

Unity 的动画系统具有处理人形角色的特殊功能。因为人形角色在游戏中很常见，所以 Unity 为人形动画提供专门的工作流程以及扩展工具集。

The “Avatar” system is how Unity identifies that a particular animated model is humanoid in layout, and which parts of the model correspond to the legs, arms, head and body.

Because of the similarity in bone structure between different humanoid characters, it is possible to map animations from one humanoid character to another, allowing retargeting and inverse kinematics.